2019 Honda Clarity PLUG-IN Hybrid

My 2019 Honda Clarity has had a hybrid battery failure that triggers “Check Engine” and “Power System” warnings, making the vehicle unsafe and unreliable to drive. I brought the car to Norm Reeves Honda Cerritos on 12/29/2025, and the battery—still under warranty—has been on backorder for over 6 months with no repair completed. The dealer repeatedly requested new diagnostic readings but has not fixed the issue. I have asked for a loaner due to safety concerns, but none has been provided. The ongoing delay leaves me with a vehicle that cannot operate safely, and Honda has not offered a timely resolution. Despite ongoing communication with American Honda Automobile Customer Service and Norm Reeves Honda Superstore Cerritos, the issue has remained unresolved.

I am writing to report an unresolved high-voltage safety defect involving the Motor Power Inverter Module on my 2019 Honda Clarity Plug-In Hybrid. The vehicle's high-voltage hybrid propulsion inverter is emitting a severe, high-pitched mechanical squealing noise during acceleration and regenerative braking.The high-voltage inverter serves as the foundational link regulating current between the lithium-ion battery and the electric drive motor. A failing inverter module presents an immediate, unreasonable safety hazard. Internal failure, thermal runaway, or component degradation within the inverter stack creates an imminent risk of sudden high-voltage isolation fault. This will result in an immediate vehicle stall and a total loss of propulsion while driving at highway speeds, leaving the vehicle stranded in traffic with no power to accelerate out of harm's way, creating a severe crash hazard.Furthermore, an authorized Honda dealership—Visalia Honda (Groppetti Automotive) in California—has failed to properly diagnose, isolate, or resolve this high-voltage drivetrain defect despite the vehicle being brought in specifically for this issue. Despite the component being legally covered under California’s mandated 15-year/150,000-mile extended emissions and hybrid warranty, the dealership has taken no constructive corrective action, allowing a known, physically degraded high-voltage component to remain active on public roadways.Federal intervention and a formal technical investigation into Honda's clarity hybrid propulsion inverter systems are required to address this vehicle stalling hazard before an electrical failure results in a highway collision.

Currently the high voltage inverter is squealing, it is currently at the dealership. They have verified it is the inverter that is malfunctioning but they will not warrenty the repair because they are saying it needs to completely fail and throw a code. This is the right time to fix it prior to catastrophic failure, can you please help.

The backup camera turns on every time when the vehicle's ignition is on, or all of sudden the backup camera turns on while driving which causes a dangerous illusion. The illusion makes the driver would have hit something because you're not reversing, instead you're driving forward. Furthermore, once the backup camera is activated, you cannot access all your information on the vehicle. The infotainment screen is overwrited by the backup camera.

The contact owns a 2019 Honda Clarity Plug-in Hybrid. The contact stated that after refueling and recharging the vehicle, the mile range indicator would display inaccurate mileage range information. The contact indicated that the mile range display would sometimes be far above the range capability of the vehicle and in some cases well below the range that should be achievable with a full battery charge and full tank of fuel. The vehicle was taken to the dealer who performed a software update and hot reset but the failure continued to occur. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 20,000.

TRY TO START VEHICLE AND IT GOES CRAZY, ALL SYSTEMS FAIL AND WILL NOT START. THIS WAS AFTER SITTING FOR ABOUT HALF HOUR IN A PARKING LOT. NEED TO GET OUT LOCK ALL DOORS WALK AWAY FOR 2 TO 5 MINS. ONCE RENTER THE SYSTEMS RESTART BUT ALL SETTINGS FAIL AND NEED TO RESET. I POSTED A YOUTUBE VIDEO (HTTPS://YOUTU.BE/N0FSEPKA5D8)

TL* THE CONTACT OWNS A 2019 HONDA CLARITY PLUG-IN HYBRID. WHILE DRIVING VARIOUS SPEEDS, THE CONTACT WOULD SWITCH FROM HYBRID TO BATTERY OPERATION. WHEN DOING SO, THE VEHICLE HESITATED AND SHUT OFF. WHEN THE VEHICLE WAS RESTARTED, IT RESUMED NORMAL OPERATION. THE VEHICLE WAS TAKEN TO METRO HONDA (9399 AUTOPLEX ST, MONTCLAIR, CA 91763, (909) 542-9637) TO BE DIAGNOSED, BUT NO FAILURE CODES WERE FOUND. THE VEHICLE WAS NOT REPAIRED AND THE FAILURE RECURRED MULTIPLE TIMES. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 2,500.